CVE-2019-25294 html5_snmp 1.11 - 'Remark' Persistent Cross-Site Scripting
Attackers can inject malicious scripts via the Remark parameter in html5_snmp, leading to arbitrary JavaScript execution in victim browsers.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2019-25294?
CVE-2019-25294 is a medium-severity cross-site scripting vulnerability in lolypop55 html5_snmp, published on 6 Feb 2026. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.
Official description
html5_snmp 1.11 contains a persistent cross-site scripting vulnerability that allows attackers to inject malicious scripts through the 'Remark' parameter in add_router_operation.php. Attackers can craft a POST request with a script payload in the Remark field to execute arbitrary JavaScript in victim browsers when the page is loaded.
Weakness: CWE-79
Which versions are affected by CVE-2019-25294?
It affects 1 product.
Products include Lolypop55 Html5 Snmp.
How do I fix CVE-2019-25294?
No fix has been published for CVE-2019-25294 yet. Limit exposure of the affected software until one is available.
Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.
Is CVE-2019-25294 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2019-25294 exists.
Other vulnerabilities in lolypop55 html5_snmp
Sources
Also known as GHSA-4wpj-97gp-j8rp.